CN1082862C - Welding method for coated sheet metal in particular tinplate - Google Patents

Welding method for coated sheet metal in particular tinplate Download PDF

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Publication number
CN1082862C
CN1082862C CN96112166A CN96112166A CN1082862C CN 1082862 C CN1082862 C CN 1082862C CN 96112166 A CN96112166 A CN 96112166A CN 96112166 A CN96112166 A CN 96112166A CN 1082862 C CN1082862 C CN 1082862C
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China
Prior art keywords
welding
thickness
coating
coating layer
determined
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Expired - Fee Related
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CN96112166A
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CN1151924A (en
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M·包姆加纳
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Elpatronic AG
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Elpatronic AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/06—Resistance welding; Severing by resistance heating using roller electrodes
    • B23K11/061—Resistance welding; Severing by resistance heating using roller electrodes for welding rectilinear seams
    • B23K11/062—Resistance welding; Severing by resistance heating using roller electrodes for welding rectilinear seams for welding longitudinal seams of tubes
    • B23K11/063—Lap welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/24—Electric supply or control circuits therefor
    • B23K11/25—Monitoring devices
    • B23K11/252—Monitoring devices using digital means
    • B23K11/257—Monitoring devices using digital means the measured parameter being an electrical current

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

For welding sheet-metal blanks coated with electrically conductive material, the thickness of the coating is measured with a measurement device. The welding current source controls the welding current I as a function of the film thickness reading obtained, to keep the power input into the weld zone essentially constant.

Description

The welding method of COATED STEEL SHEETS FOR, particularly steel sheet for tin and device thereof
The present invention relates to a kind ofly sheet metal with conductive coating be carried out electric resistance welding, particularly welds the method for tank body by the roller seam soldering machine.The present invention also relates to a kind of device of realizing this method.
For the COATED STEEL SHEETS FOR blank that will weld, the thickness of conductive coating plays a part can not be ignored to welding quality.Particularly when taggers tin is welded into tank body, have been found that the tin thickness on employed low steel sheet for tin may have bigger variation.The measurement that the coiled material of this material is done shows: for the coating that requires is 1g/m 2The time, the thickness of tin layer might be increased to 3.0g/m on the width of the about 900mm of coiled material 2About.Higher reading mainly occurs in the boundary of coiled material.When forming an overlapping the slot so that carry out roller seam soldering when connecing, to have four layers of tin layer between welding electrode, because welding is normally carried out under the constant welding current that is produced by the known CONSTANT CURRENT WELDING power supply that can suitably control, therefore, the thickness of such tin layer will produce very important influence to welding result.Because the variation of the tin coating thickness of sheet metal blank, the resistance change of overlapping the slot, this change make the electric energy that is input to the weld zone produce change, are unfavorable for obtaining good welding quality.These are applicable to other coating metal sheet except that taggers tin too.
The object of the present invention is to provide a kind of welding method that does not have this shortcoming.Realize that such welding method is by when welding machine is worked, the coating layer thickness of workpiece on the one side is at least determined in upstream at welding region, and by in the welding operation process, relying on determined coating layer thickness to control the source of welding current of welding machine, so that make the electric energy that is input to welding region approach ideal value.
During the blank welding, can influence the source of welding current, change welding current, so that make the electric energy input keep constant according to coating layer thickness by the thickness of definite coating or the coating amount on blank.Therefore, because the thickness of coating, the source of welding current need mate with a kind of ongoing mode and very possible interactional contact resistance.Thin coating has lower contact resistance (although situation can be different, depending on coating material) and the bigger electric current of needs usually, otherwise probably produces cold welding.The new-type source of welding current (the UNISOUD type source of welding current that provides as the Soudronic by Switzerland) at present can be with constant current work, yet can bear the welding current of rapid fluctuation, thereby very rapidly respond the variation of welding process floating coat thickness.
Describe the embodiment that realizes concrete mode of the present invention in detail below in conjunction with accompanying drawing.
Fig. 1 represents the method for operating according to tank body welding of the present invention very briefly;
Fig. 2 represent very briefly to determine coating layer thickness a kind of measurement technology and
Fig. 3 represents the curve by the characteristic x ray intensity of radionetric survey technology acquisition.
Fig. 1 expresses the step according to the method for operating of tank body welding of the present invention very briefly.In order to weld tank body, straight sheet metal blank 1 is made cylinder 2 on a cylinder building mortion.The formed cylinder of representing with label 3 has an overlap usually in the drawings, and this overlap is soldered on the roller seam soldering machine, so that form an overlapping the slot.This seam is welded between the top electrode 4 of roller seam soldering machine and bottom electrode 5.Usually use wire electrode: these electrodes roll 4 and 5 and pass from illustrated, but do not illustrate in the drawings.The welding current that produces weld seam is provided by the source of welding current 6.It comprises a welding transformer and an exciter 8 that is used for transformer.Exciter 8 provides primary voltage as the frequency of 500HZ from supply voltage U for transformer of welding source.
Constant welding current I establishes by return the electric current that is fed to exciter 8 from the primary side of transformer 7 usually, and exciter 8 has a corresponding adjuster.Yet, if the coating layer thickness of COATED STEEL SHEETS FOR on a compact spare or from one to another piece, change, just constant welding current I makes the electric energy change be input to welding region, therefore, the welding quality instability.According to the present invention, just when welding, measure the coating layer thickness of blank 1, and welding current is according to the varied in thickness of coating.In the simple diagram of Fig. 1, measurement mechanism 11 has this purposes.It measures the coating layer thickness on the sheet metal blank 1.Send the result who is obtained to the source of welding current 6, the source of welding current 6 can arrive welding roll 4 and regulate welding current at 5 o'clock at relevant blank 1, so that adapt to the coating layer thickness of reading.Coating layer thickness can only be determined in a side of blank by measurement mechanism 11.In addition, one second measurement mechanism 12 also can be arranged on the opposite side of blank, so that measure the thickness of coating in that side.
Blank can be the sheet metal blank of various forms of coatings.Shown in concrete application in, i.e. tank body welding is generally taggers tin, promptly all has the sheet metal of tin layer usually in two sides.Be preferably in and make blank become circle to become the coating layer thickness of measuring blank behind the tank body in the formed welding region.When blank is in straight state, do not measure, can certainly make blank become the thickness that coating is determined in the circle back.
In order to realize this method, the source of welding current 6 has the input of the reading feed-in that an energy will obtain by measurer for thickness 11 at least.Then,, utilize this reading to change welding current, for example, a given measurement thickness is adopted the welding current of the setting value of keeping by the source of welding current this moment according to the thickness of measuring.If also have one second measurer for thickness 12, the signal output of this device also is used for control, for example by combining with the signal output of first measurer for thickness 11.No matter be in the mode of continuous measurement or on every compact spare, to measure the mode of series of points, the measurement of thickness and the coupling of welding current can very rapidly realize, so that by changing the variation that welding current compensates the coating layer thickness on a tank body or blank.In addition, measure according to a place or the many places of the coating layer thickness on blank.Can an employing determine for each blank at all effective current value of the whole welding process of this blank, so that electric current does not change in the weld seam of this blank.Like this, have roughly uniformly coating and this blank each blank different just, can obtain welding more uniformly with the coating layer thickness of that blank for a series of.The blank of taking from the coiled material boundary member has thicker tin layer than the blank of taking from the coiled material middle body usually.
Adopt in traditional welding method, because contact resistance is lower, such blank mixes with the blank of taking from the coiled material middle body, makes at thicker tin layer region generation cold welding.By adopting welding method of the present invention, according to two variations that illustrate, the available suitable electric current of each blank (being each tank body) welds, and/or electric current can change in a given tank body, so that guarantee to obtain best welding.
Fig. 2 has schematically represented an embodiment of the coating thickness measurement on taggers tin blank 1.The part of blank is shown with the vertical section; It comprises one at least in a side, has the sheet metal 13 of tin coating 15 usually in both sides.Between sheet metal and coating, form an iron/tin intermediate layer 14.When with high energy electromagnetic wave (X ray or r ray) radiation sheet metal 13 surperficial, inspire the ray of a kind of distinctive steel and tin layer.Among Fig. 2, gamma-rays being expressed as 16, is 17 with the ray representation of distinctive steel and tin, and wherein ray 17 is received and analyzed by ray receiver 18.As shown in Figure 1, the result of analysis is transfused to the source of welding current.Such measurement mechanism itself is well-known, and the producer of coated sheet metal is used to control and monitor the spraying plating of tin.The coating of measuring on the sheet metal is utilized high energy Fe-K usually αRay is as characteristic x ray 17.This characteristic x ray 17 changes and is weakened in different still concrete modes owing to tin coating thickness, therefore, and Fe-K αRay weaken the measurement that is used for its coating layer thickness.
Fig. 3 draws out Fe-K αRay 20 and Sn-K αThe characteristic x ray intensity of ray 21 is with respect to the curve map of the tin coating thickness on the sheet metal.From curve map, be clear that,, just can accurately determine tin coating by measuring transmitted intensity 20.
Do not adopt the thickness of radionetric survey systematic survey coating, can certainly adopt other measurement technology, for example the magnetic of available COATED STEEL SHEETS FOR or electrical quantity are determined the thickness of coating.At specific occasions,, can from the known process that is fit to, select optimal technology for each relevant coating.

Claims (9)

1. method of the sheet metal with conductive coating being carried out resistance welded by the roller seam soldering machine, it is characterized in that when welding machine is worked, the coating layer thickness on workpiece one side is at least determined in upstream at welding region, and in the welding operation process, control the source of welding current of welding machine, so that make the electric energy substantially constant that is input to welding region according to determined coating layer thickness.
2. in accordance with the method for claim 1, it is characterized in that coating layer thickness measures on the steel-sheet both sides in the zone that will become weld seam.
3. in accordance with the method for claim 1, it is characterized in that the sheet metal that will weld is the thickness that taggers tin and needs are determined its tin layer.
4. in accordance with the method for claim 2, it is characterized in that the sheet metal that will weld is the thickness that taggers tin and needs are determined its tin layer.
5. according to each the described method in the claim 1 to 4, it is characterized in that the thickness of coating is determined by radionetric survey technology.
6. the characteristic x ray gamma-rays actinometry that it is characterized in that in accordance with the method for claim 5, base material.
7. according to each the described method in the claim 1 to 4, it is characterized in that coating layer thickness can be determined by electricity and/or magnetic parameter.
8. be used to realize the device of the described method of claim 1, it is characterized in that one is rolled the seam machine and has a controlled source of welding current (6), a device (11 of measuring coating layer thickness, 12), and control or regulating element (8), wherein control or regulating element (8) obtain to be used for the control signal that welding current is adjusted from the output signal of coating thickness determination device.
9. according to the described device of claim 8, it is characterized in that the device of measuring coating layer thickness comprises a gamma ray projector and a gamma-rays receiver.
CN96112166A 1995-08-09 1996-08-09 Welding method for coated sheet metal in particular tinplate Expired - Fee Related CN1082862C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH02291/95 1995-08-09
CH229195 1995-08-09

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Publication Number Publication Date
CN1151924A CN1151924A (en) 1997-06-18
CN1082862C true CN1082862C (en) 2002-04-17

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US (1) US5841094A (en)
EP (1) EP0761368B1 (en)
JP (1) JP2755938B2 (en)
KR (1) KR970009965A (en)
CN (1) CN1082862C (en)
BR (1) BR9603348A (en)
DE (1) DE59604358D1 (en)
RU (1) RU2162396C2 (en)
TW (1) TW310289B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
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CN101941117A (en) * 2009-07-02 2011-01-12 苏德罗尼克股份公司 Method, the welder of evaluation welding current intensity during the welded vessel main body

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EP1175951B1 (en) * 2000-07-27 2006-12-20 Elpatronic Ag Method and apparatus for lap seam welding of sheet material
ES2364141T3 (en) * 2003-09-16 2011-08-25 Soudronic Ag BOAT WELDING MACHINE WITH DUST MONITOR.
DE102005058588B4 (en) * 2004-12-27 2009-02-26 Joachim Zens Apparatus for seam welding a workpiece
JP4505491B2 (en) * 2007-11-05 2010-07-21 新日本製鐵株式会社 Apparatus and method for heating welded portion of steel pipe
JP4600873B2 (en) * 2008-02-20 2010-12-22 株式会社ホンダアクセス Method for manufacturing painted metal parts using welding
US9085044B2 (en) 2008-04-17 2015-07-21 Soudronic Ag Method and welding apparatus for the determination of the strength of the welding current to be used in the welding of container bodies
PT2119516E (en) * 2008-05-14 2013-10-24 Soudronic Ag Method for marking sheet metal and marking-dependent welding of container bodies from such sheet metal
WO2010004656A1 (en) * 2008-07-11 2010-01-14 三菱日立製鉄機械株式会社 Mash seam welding method and equipment
CH700870A2 (en) * 2009-04-22 2010-10-29 Soudronic Ag A process for the production of container bodies of sheet metal and device for carrying out the method.
CH707161A1 (en) * 2012-11-06 2014-05-15 Soudronic Ag Method and Apparatus for the seam welding of container bodies.
CH707362B1 (en) * 2012-12-17 2019-05-15 Soudronic Ag Method for destacking metal sheets and stacking device.
CN103630094A (en) * 2013-01-21 2014-03-12 中电投工程研究检测评定中心 Online thickness detection method for chromium-free film at surface of strip steel
CN103252556A (en) * 2013-04-25 2013-08-21 吴江市云通钢桶机械厂 Seam welding method with welding directly achieved by galvanized steel plate and hot dip galvanizing coating not damaged
CN104677852A (en) * 2013-11-27 2015-06-03 上海宝钢工业技术服务有限公司 Strip steel magnesium oxide coating quality online detection system
RU2553314C1 (en) * 2014-01-09 2015-06-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Липецкий государственный технический университет" (ЛГТУ) Method of electric contact welding of metal plates with coating
US20180001370A1 (en) 2014-05-28 2018-01-04 Taylor-Winfield Technologies, Inc. Barrel tank seam welder system
US20150343507A1 (en) * 2014-05-28 2015-12-03 Taylor-Winfield Technologies, Inc. Barrel tank seam welder system
EP3028836B1 (en) * 2014-12-04 2017-11-01 Leister Technologies AG Welding machine for connecting of overlapping sheets of material
CH713739A2 (en) * 2017-04-28 2018-10-31 Soudronic Ag Method and device for roll seam welding of container frames.
CN107457475A (en) * 2017-07-24 2017-12-12 南昌大学 The coating unit and method of metal surface wear-resistant coating
JP7027122B2 (en) * 2017-10-27 2022-03-01 シロキ工業株式会社 How to seam weld vehicle door sashes

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JPS5665995A (en) * 1979-10-31 1981-06-04 Kawasaki Steel Corp Production of tin-plated steel plate of high work efficiency
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101941117A (en) * 2009-07-02 2011-01-12 苏德罗尼克股份公司 Method, the welder of evaluation welding current intensity during the welded vessel main body
CN101941117B (en) * 2009-07-02 2014-07-30 苏德罗尼克股份公司 Method and welding device for the evaluation of the welding current intensity during the welding of container bodies

Also Published As

Publication number Publication date
DE59604358D1 (en) 2000-03-09
TW310289B (en) 1997-07-11
US5841094A (en) 1998-11-24
EP0761368A1 (en) 1997-03-12
RU2162396C2 (en) 2001-01-27
KR970009965A (en) 1997-03-27
CN1151924A (en) 1997-06-18
JP2755938B2 (en) 1998-05-25
JPH09103886A (en) 1997-04-22
BR9603348A (en) 1998-05-05
EP0761368B1 (en) 2000-02-02

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